SAN MATEO — Officials paid out $63,500 in cash Saturday to gun owners who turned in over 680 firearms, including 24 assault weapons, less than two months after the massacre at a Connecticut elementary school, said a Congresswoman.

“Every weapon turned in is one less life that might be lost or damaged by a firearm, whether accidentally or intentionally,” said event co-sponsor Rep. Jackie Speier, D-Hillsborough.

Among the weapons Sheriff’s deputies stacked into garbage cans at the county Event Center, were 100-round and 30-round capacity magazines, which are illegal to sell in California. Someone also turned in a high-capacity shotgun that is known by the ominous moniker “street sweeper.”

During the no questions asked event, authorities paid up to $100 for handguns, shotguns and rifles as well as a maximum of $200 for assault weapons.

This “buy back” event comes after a string of similar ones held around the Bay Area since the Dec. 14 shooting at Sandy Hook Elementary School that left 20 children dead. It was co-sponsored by San Mateo County Supervisor Adrienne Tissier and Sheriff Greg Munks.

Otto Warmbier was arrested in January 2016 at the end of a brief tourist visit to North Korea. He had been medically evacuated and was being treated at the University of Cincinnati Medical Center when he died at age 22.